The Codnor Park works closed in 1965. In 1966, Montagu "Monty" Francis Melville Wright retired as Chairman and was succeeded by Robert William Francis Wilberforce; John Leslie Fitzwalter Wright, son of (Edward) Fitzwalter Wright became vice-Chairman. He was the sixth generation of the Wright family to join Butterley. The last descendant of John Wright to be a director was (Philip) Norman Wright, who retired after the takeover in 1968. The company was acquired by the Wiles Group, which later became Hanson Trust, in 1968 for £4.7 million. The company was subsequently split up into Butterley Engineering, Butterley Brick and Butterley Aggregates. Butterley Hall, Outram's home and later the companies offices, was sold off to become the headquarters of Derbyshire Constabulary. Butterley Engineering Co. manufactured the Glengall Bridge across the Millwall Dock in London, which was designed to open to allow shipping traffic to pass through. The same year, Butterley Engineering Co., known for their expertise with high-tech cranes, were awarded the contract to manufacture a special 'super-safe' crane to work above the reactor at Sizewell B nuclear power station in Suffolk. In the mid 1980s the foundry closed down. When surplus buildings were demolished the original blast furnace of 1790 was exposed. 21st century The company entered the 21st century with a well-established reputation for constructing bridges, overhead cranes and structural steelwork. One of the company's prestige projects was the Falkirk Wheel, a boatlift at Falkirk, Scotland to reconnect the Forth & Clyde Canal and the Union Canal in place of a derelict flight of 11 locks. Designed by RMJM architects, it was funded by the Millennium Commission. The company constructed the Spinnaker Tower in Portsmouth. On 5 March 2009, the company was placed into administration, the administrator stating "This is a highly specialist business that has proven vulnerable to the economic downturn". Following the closure of Butterley Limited in 2009, Wellman Booth acquired certain assets, spares and intellectual property rights of the company. Wellman Booth is a division of The Clarke Chapman Group Ltd, itself a wholly owned subsidiary of Langley Holdings plc. Demolition of the works was undertaken in November and December 2009. The blast furnaces, part of the canal tunnel and its underground wharf were declared a scheduled monument in 2013. The Butterley Ironworks Trust was formed in 2015 to formulate plans for future uses of the remaining Butterley Company buildings, archaeological remains and the Butterley Tunnel.